Engine not shifting right on 1994 BMW 318is

I just change the transmission oil in my car and now when I put the car on drive and step on the gas , it will take like 20 to 30 seconds to move and when shift gears will jerk. I don't kow if it is my fluid level or something else. Please help

Asked by for the 1994 BMW 318is
Sounds like low fluid, but have a tech check this before you damage the transmission